Multiple-flue heater



Feb. 26, 1929.

T. A. SALA MULTIPLE FLUE HEATER Filed April 1928 2 Sheets-Shee Feb 26,1929- T. A. SALA MULTIPLE FLUE HEATER Filed April 1928 2 Sheets-Shem v wM 2/ n W 5 W w, 4 5 w r; w A 00 000 /4 2 z "/Il/i/IA I74. In IYIII;

TALSQA Patented Feb. 26, 1929.

UNITED STATES;

PATENT OFFICE.

THEODORE A. SALA, DALLAS, TEXAS.

MULTIPLE-FLUE, HEATER.

Application filed April 5 sirable locations for producing the bestheat'g ing results.

Another object of the invention is to concentrate the discharge of thehottest air currents at the upper central portion of the grille, wherebythe most eflicient circulation will be set up and also whereby the sideand top margins of the grille will only be subj ected to therelativelycooler heated air currents.

An important object of the invention is to utilize to the fullest extentthe heat generated in the fire box, whereby the greatest volume of airmay be heated by a given fire and full advantage of a maximum radiationhad.

A still further object of the invention is to provide an arrangement offlues and component parts lending themselves to a more compact, Ieflicie'nt and economical organization. a a i A construction designed tocarry out the invention will be hereinafter described, together withother features of the invention.

The invention will be more readily under stood, from a reading of thefollowing specification and by reference to the aceompanying drawings,in which an example Ofthe invention is shown and wherein: p

. Fig. 1 is a front view of a heater constructed in accordance with theinvention,

Fig. 2 a similar view, the grille being omitted and a portion being'insection, I

Fig. 3 is a vertical sectional. view,

Fig. 4 is a detail partly in section and partly in elevation,

Fig. 5 is a horizontal cross-sectional view taken on the line 5-5 ofFig. 3, and.

Fig. 6 is an enlarged sectional detail taken on the line 6'6 of Fig. 5f

In the drawings the numeral 10 designates a jacket or outer casinglncluding outwardly flared vertical wings or sides 11 and upwardlyinclined top 12. At the open i' nt of the jacket outwardly directed.

1928. Serial no. 267,578.

vertical flanges 13 are formed on the front edges of the wings, while anupwardly di rected horizontal flange 14 is provided on the front edge ofthe top 12. These flanges form a ready means of securing a front grille15 to the jacket, which overlaps the flanges and conceals the same. Thegrille is made slightly larger than the opening receiving the jacket, soas to overlie the surrounding panel 16 (Fig. 1), thus adding to theornamental appearance.

The grille and jacket when united constitute a unit which may be readilyslipped into place. Of course the grille and jacket could be'secured insome other way. The

' grille may be given any desired design and finish.

- Within the jacket I dispose an inner vertical shell 17 having aninclined top 18 and provided with flared wings 19. This shell hassubstantially the same shape as the jacket and is placed concentricallytherein. However, this particular shape and exact arrangement is notessential to the invention. Abottom 20 connects thelower edge of theshell 17 with the lower edge of the jacket'lO.

Between the jacket and the inner shell 17 I dispose an intermediateshell or divider 21 which has an inclined top 22 and vertical side wings23. This divider exhibits a rectangular shape in plan, the wingsextending at substantially right angles to the back ,wall. The innershell has. vertical out-v wardlydirected flanges 24 on the front edgesof the wings 19 by which it is securedto the 'grille15 contiguous to thefire opening 25' of said grille. I

While the shape of the divider 21 is subject to change, convenience inassembling is obtained by'turning-vertical flanges 26 on the front edgesof the wings 23'and securing said flanges to the rear sides of theflanges 1 245, by means ofbolts 27 whereby the parts are fastened to thegrille.

The jacket and the divider form a vertical flue A therebetween; in plan,as is shown in Fig. 5, and has its front covered by the grille 15. Thedivider 21 and the inner shell 17 form a vertical flue B, the front ofwhich is closed by the This flue is U-shaped flanges 24 and 26' and afront plate 28 (Figs.

and 4). The entire front of the flue A being exposed through the grille,air may enter and escape thrmi h said girdle:

It is pointed out that the flue B is open only at its top and bottom.Air admitting ports 29 near the bottom of the shell 1? provi deentrances for air to the flue B and adj acent openings 30 in the bottomof the divider 21 admit air to the lower end of the flue A.

Within the shell 17 I dispose a vertical fire back 31 spaced from theshell and including outwardly flaring wings 32 provided with laterallydirected vertical flanges secured to the wings 19 of: the shell. Thefirehackhas its top andhottom terminating short of. the'top'and bottomof the shell and co-acts therewith to. form a short vertical flue. C.

The firehack, together with the wings 19, forms the fire loox of. theheater. A suitable horizontal burner 34, gasor other fuel, is placedWithin the fire back at the bottom thereof and radiants 35 may bemounted on theburner in the usual manner. A shield 36provided. with. aninclined top 37 and a depending apron 38 mounted. on legs 39 is fittedin the lower portion of the grille opening. 25. The apron has draftslots 1-0 and abuts the grille, while the top 37 inclines up to theburner 34. As is shown in Fig. 1,.the shielezconceals-the ports 29 andthe burner parts, aswell as. the lower portion of the shell1.7,.thusenhancingthe ornamental appearance of. the heater.

It is: evident thatthe heated. air currents rising from the radiants 35will. be most intense. Air. currents passing up. the flue G will beheated to a; high. degree, but will carry off or cause the radiation ofa large amount of. heat; Air currents passing up thefiue B will also. beheated anilwill carry ofl heat,.hut these currents will not he so hot.The heat of the air currents passing through theflue A will he moderate.

From: the foregoing, two things will be apparent. First, that. thegenerated heat. is dissipated to. a maximum and rapidly carriedoff,vwhereby a: large volume of air is heated. Second, that theair. currentspassing through the various flues will: be heated to diflerent degreesFarenheits and: thuswill flow. at'difl'erent ratesof speed. I

In'order. to segregate the discharges. of the flue currents and toconfine the most intensely heated to the upper centerof the grille, thetop 18 of the shell is merged into a central duct D and a front baffle41. inclines from the top of the fire box to the duct D. The hot aircurrents from the radiants andthe'flue G aremcrged at the topof the fireboxand discharged from the duct Dv at the center of the grille.

The top 22 ofth'e divic 21 also merged into a central duct E whichsurrounds the duct. D and is spaced therefrom. The air currents from theflue B are discharged through the duct E.

In order to keep the main body of the llody ofthe grille.

grille 15 relatively cool, an outwardly displaced panel 43 is attachedto the grille at each end and covers an opening 44 through which theducts I) and E are exposed. The intenseheat i i omithe ducts contactswith the panel which obviates its transmission to the This panel fomsthe subject. matter of a separate application.

When the burner 34 is operating, heated air currents of the highesttemperature. will be discharged through the duct D from the fire. boxand the flue C. The air passing up the flue G will carry off the heatfrom the lire hack 31, thus keeping the same rela tively cool anddissipating the heat.

Air will. be drawn into the flue B through the ports 29 and. as this airpasses upward in said flue, it willhe heated by. contact with the shell1? and. the divider 2.1. This air will be discharged. from the duct E.The hotter air currents emerging from the duct D will have a tendency todraw the. air currents from the duct E owing to the lower temperature ofsaid air currentsflowing from the duct EL This action will promotecirculation and result that the: jacket 10 will not. be heated to anymarked Xtent, so that said jacket may be safely mounted in a woodencabinet or mantle. i

The air currents discharged from the fines, each having differenttemperatures, will set up. a rapid circulation. The flue B and its ductE, substantially surrounding the flue-(1,. lire box and duct D, will.aid materially in carrying oil the high heat. The flue A being. aroundand over the other lines and ducts will cause a further heat dissipationor radiation. and will protect surrounding woodwork.

Various changes in the size and shape of the different parts. as well asmodifications and alterations, may he made within the scope of theappended claims.

l Vhat I claim, is:

1. In a heater, the combination of an open lire box, a duct connectedwith the top of the fire lQOX,.ZL vertical ihie-contiguous to the firebox, a second duct connected with the top of the flue and contiguous tothe first. duct, a jacket within which the tire box, flue and ducts arecontained and from. which the parts are spaced, and 'a grille coveringthe front ofthe jacket and having a segregated. area through which theducts discharge.

and a grille covering the front of the jacket and having a sectionspaced inwardly from its margin through which the ducts dis charge.

3. In a heater, the combination. of a jacket, a divider within thejacket and spaced therefrom to form. a flue, a shell. within the'dividerand spaced therefrom to form a second fine, a fire box within the shell,a duct directed forwardly from the top of the fire box, a second ductdirected forwardly from the top of the second flue and substantiallysurrounding the first duct, and a grille covering the front of thejacket and having a section spaced. inwardly from its margin throughwhich the ducts discharge, the first flue receiving air. through thegrille and the second flue having air admitting openings. at its lowerportion.

l. In a heater, the combination of a jacket, a divider within the jacketand spaced therefrom to form a flue, a shellwithin the divider andspaced therefrom toform a second flue, a fire box within the shell, afire back within the fire box and spaced from the shell to form a thirdflue, a duct directed'forwardly and receiving heated air currents fromthe top of the fire box and the third flue, said first duct beingreduced to a comparatively small area, a second duct within which thefirst duct is located and receiving air currents from the second flue,and a grille co-vering the front of the jacket and through which aircurrents from the first flue are discharged above and on each side ofsaid ducts and through which said ducts also discharge.

5. In a heater, the combination of ajacket,

a divider within the jacket and spaced therefrom to form a flue, a shellwithin the divider and spaced therefrom to form a second flue, a firebox within. the shell, a fire back Within the fire box and spaced fromthe shell to form a third flue, a duct directed forwardly and receivingheated air currents from the top of the fire box and the third flue,said first duct being reduced. to a comparatively small area, a secondduct within which the first duct is located and receiving air currentsfrom the second flue,and a grille covering the front of the jacketand'through which air currents from the first flue are discharged aboveandon each side of said f ducts and through which said ducts alsodischarge, the shell having ports at its lower end for at'lmitting-airto the second flue, the

bottom of the third flue being open-for receiving air from below thefire box.

6. In a heater, the combination of a jacket having outwardly flaredwings and an mclined top, flanges on the front'edges of the wings andtop, a grille attached to said flanges and having a fire opening, adivider within the jacket having wings, and a shell within the dividerhaving wings, the wings of the divider and the shell being attached tothe grille contiguous to its fire opening.

7 In a heater, the combination of a jacket clined top, flanges on thefront edges of the wings and top, a grille attached to said flanges andhaving a fire opening, a divider within the jacket having wings, a shellwithin the divider having wings, the wings of the having outwardlyflared wings and an individer and the shell being attached to the grillecontiguous to its fire opening, a fire back within the shell, a burnerat the bottom of the fire back, a duct attached to the divider, and asecond duct within the front duct and attached to the top of the shell,both ducts having their discharge ends contiguous to the grille abovethe fire opening.

8. In a heater, the combination of a jacket having outwardly-flaredwings and an inclined top, a grille attached to the wings and top of thejacket and having a central fire opening, a shell within the jackethaving outwardly flared wings and an inclined top, and a dividerdisposed between the jacket and the shell and forwardly directed wingsand an inclined top, the front edge portions of the wings of the shelland also, the divider being secured in common to the grille contiguousto the fire opening thereof.

9. In a heater, the'combination of a jacket having outwardly flaredwings and an inclined top, a grille attached to the wings and top of thejacket and having a central fire opening, a shell within the jackethaving outwardly flared wings and an inclined top, a divider disposedbetween the jacket and the shell and forwardly directed wings and aninclined top, the front edge portions of the wings of the shell and alsothe divider being secured in common to the grille contiguous. to thefire opening thereof, a burner within,

inclined top, thefront edge portions of the fitting against the grilleendhaving a top Wings ofthe shell andelso the divider being inclined upto the burner Wiihin the shell, secured: in common. to she grillecontiguous the shield having draftv openings for supply- 10 to-the fineopening thereof, a fire back withing air below the burner.

in the shell having flared Wings, a horizontal In testimony whereof Iaffix my signature. burner at the botfiom of thefire back extendingbetweenthewings thereof-, and a shield THEODORE A. SALA.

